UNIX for Advanced & Expert Users

Hi all,

I have an aix 5.3 running open ssh 1.75 i think

only root can sftp into the server. I appears to authenticate OK via the verbose output. Here it is:

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u060oemd11:/home/patrol>sftp -v u060oemd11
Connecting to u060oemd11...
OpenSSH_4.7p1, OpenSSL 0.9.8f 11 Oct 2007
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Failed dlopen: /usr/krb5/lib/libkrb5.a(libkrb5.a.so): 0509-022 Cannot load module /usr/krb5/lib/libkrb5.a(libkrb5.a.so).
0509-026 System error: A file or directory in the path name does not exi st.
debug1: Error loading Kerberos, disabling Kerberos auth.
debug1: Connecting to u060oemd11 [10.1.98.54] port 22.
debug1: Connection established.
debug1: identity file /home/user/.ssh/id_rsa type 1
debug1: identity file /home/user/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_4.7
debug1: match: OpenSSH_4.7 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.7
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'u060oemd11' is known and matches the RSA host key.
debug1: Found key in /home/user/.ssh/known_hosts:1
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password,keyboard-interacti ve
debug1: Next authentication method: publickey
debug1: Offering public key: /home/user/.ssh/id_rsa
debug1: Authentications that can continue: publickey,password,keyboard-interacti ve
debug1: Trying private key: /home/user/.ssh/id_dsa
debug1: Next authentication method: keyboard-interactive
debug1: Authentications that can continue: publickey,password,keyboard-interacti ve
debug1: Next authentication method: password
user@server password:
debug1: Authentication succeeded (password).
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
debug1: Sending subsystem: sftp
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug1: channel 0: free: client-session, nchannels 1
debug1: fd 0 clearing O_NONBLOCK
debug1: Transferred: stdin 0, stdout 0, stderr 0 bytes in 0.0 seconds
debug1: Bytes per second: stdin 0.0, stdout 0.0, stderr 0.0
debug1: Exit status 1
Connection closed

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Also here is the /etc/ssh/ssh_config:
I copied and replaced this from a working server and stopped/started sshd
This one is hurting my head, any help???

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cat /etc/ssh/sshd_config
# $OpenBSD: sshd_config,v 1.75 2007/03/19 01:01:29 djm Exp $
# This is the sshd server system-wide configuration file. See
# sshd_config(5) for more information.
# This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin
# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented. Uncommented options change a
# default value.
Port 22
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::
# Disable legacy (protocol version 1) support in the server for new
# installations. In future the default will change to require explicit
# activation of protocol 1
Protocol 2
# HostKey for protocol version 1
HostKey /etc/ssh/ssh_host_key
# HostKeys for protocol version 2
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_dsa_key
# Lifetime and size of ephemeral version 1 server key
#KeyRegenerationInterval 1h
#ServerKeyBits 768
# Logging
# obsoletes QuietMode and FascistLogging
#SyslogFacility AUTH
#LogLevel INFO
# Authentication:
#LoginGraceTime 2m
#PermitRootLogin yes
#StrictModes yes
#MaxAuthTries 6
#RSAAuthentication yes
#PubkeyAuthentication yes
#AuthorizedKeysFile .ssh/authorized_keys
# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
#RhostsRSAAuthentication no
# similar for protocol version 2
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# RhostsRSAAuthentication and HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes
# To disable tunneled clear text passwords, change to no here!
#PasswordAuthentication yes
#PermitEmptyPasswords no
# Change to no to disable s/key passwords
#ChallengeResponseAuthentication yes
# Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no
# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes
# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the ChallengeResponseAuthentication and
# PasswordAuthentication. Depending on your PAM configuration,
# PAM authentication via ChallengeResponseAuthentication may bypass
# the setting of "PermitRootLogin without-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and ChallengeResponseAuthentication to 'no'.
#UsePAM no
#AllowTcpForwarding yes
#GatewayPorts no
#X11Forwarding no
#X11DisplayOffset 10
#X11UseLocalhost yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#UsePrivilegeSeparation yes
#PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
#UseDNS yes
#PidFile /var/run/sshd.pid
#MaxStartups 10
#PermitTunnel no
# no default banner path
#Banner /some/path
# override default of no subsystems
Subsystem sftp /usr/sbin/sftp-server
# Example of overriding settings on a per-user basis
#Match User anoncvs
# X11Forwarding no
# AllowTcpForwarding no
# ForceCommand cvs server
# X-Company Standard Parameter for SSH
# Be sure to rename this file /etc/ssh/sshd_config instead of sshd_config.aix!!!
#ListenAddress xxx.xxx.xxx.xxx # CHANGE xxx's to server's public IP address
PermitRootLogin yes
PidFile /etc/ssh/sshd.pid
UsePrivilegeSeparation no
AllowTcpForwarding no


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Thanks in advance
-Dfezz

Putting the sshd on the server into debug mode with ssh -d and posting what the log files at the server end contains during your sftp attempt would be helpful.

If you see anything here that helps your doing better than I am?

I see and issue with FD9, but haven't looked it up yet.
Thanks

#################################################
debug2: load_server_config: filename /etc/ssh/sshd_config
debug2: load_server_config: done config len = 413
debug2: parse_server_config: config /etc/ssh/sshd_config len 413
debug3: /etc/ssh/sshd_config:13 setting Port 22
debug3: /etc/ssh/sshd_config:21 setting Protocol 2
debug3: /etc/ssh/sshd_config:24 setting HostKey /etc/ssh/ssh_host_key
debug3: /etc/ssh/sshd_config:26 setting HostKey /etc/ssh/ssh_host_rsa_key
debug3: /etc/ssh/sshd_config:27 setting HostKey /etc/ssh/ssh_host_dsa_key
debug3: /etc/ssh/sshd_config:60 setting PasswordAuthentication yes
debug3: /etc/ssh/sshd_config:61 setting PermitEmptyPasswords no
debug3: /etc/ssh/sshd_config:110 setting Subsystem sftp /usr/sbin/sftp-server
debug3: /etc/ssh/sshd_config:121 setting PermitRootLogin yes
debug3: /etc/ssh/sshd_config:122 setting PidFile /etc/ssh/sshd.pid
debug3: /etc/ssh/sshd_config:123 setting UsePrivilegeSeparation no
debug3: /etc/ssh/sshd_config:124 setting AllowTcpForwarding no
debug1: sshd version OpenSSH_4.7p1
debug1: private host key: #0 type 0 RSA1
debug3: Not a RSA1 key file /etc/ssh/ssh_host_rsa_key.
debug1: read PEM private key done: type RSA
debug1: private host key: #1 type 1 RSA
debug3: Not a RSA1 key file /etc/ssh/ssh_host_dsa_key.
debug1: read PEM private key done: type DSA
debug1: private host key: #2 type 2 DSA
debug1: rexec_argv[0]='/usr/sbin/sshd'
debug1: rexec_argv[1]='-d'
debug1: rexec_argv[2]='-d'
debug1: rexec_argv[3]='-d'
debug2: fd 3 setting O_NONBLOCK
debug1: Bind to port 22 on 0.0.0.0.
Server listening on 0.0.0.0 port 22.
debug2: fd 4 setting O_NONBLOCK
debug1: Bind to port 22 on ::.
Bind to port 22 on :: failed: The socket name is already in use..
debug1: fd 4 clearing O_NONBLOCK
debug1: Server will not fork when running in debugging mode.
debug3: send_rexec_state: entering fd = 7 config len 413
debug3: ssh_msg_send: type 0
debug3: send_rexec_state: done
debug1: rexec start in 4 out 4 newsock 4 pipe -1 sock 7
debug1: inetd sockets after dupping: 4, 4
debug1: audit connection from 10.x.x.x port 62644 euid 0
Connection from 10.x.x.x port 62644
debug1: Client protocol version 2.0; client software version OpenSSH_4.7
debug1: match: OpenSSH_4.7 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.7
debug3: Value for authType is STD_AUTH
debug1: Failed dlopen: /usr/krb5/lib/libkrb5.a(libkrb5.a.so): 0509-022 Cannot load module /usr/krb5/lib/libkrb5.a(libkrb5.a.so).
0509-026 System error: A file or directory in the path name does not exist.
debug1: Error loading Kerberos, disabling the Kerberos auth
debug2: fd 4 setting O_NONBLOCK
debug1: list_hostkey_types: ssh-rsa,ssh-dss
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib@openssh.com
debug2: kex_parse_kexinit: none,zlib@openssh.com
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_setup: found hmac-md5
debug1: kex: client->server aes128-cbc hmac-md5 none
debug2: mac_setup: found hmac-md5
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST received
debug1: SSH2_MSG_KEX_DH_GEX_GROUP sent
debug2: dh_gen_key: priv key bits set: 133/256
debug2: bits set: 488/1024
debug1: expecting SSH2_MSG_KEX_DH_GEX_INIT
debug2: bits set: 517/1024
debug1: SSH2_MSG_KEX_DH_GEX_REPLY sent
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: KEX done
debug1: userauth-request for user patrol service ssh-connection method none
debug1: attempt 0 failures 0
debug3: Trying to reverse map address 10.x.x.x.
debug2: parse_server_config: config reprocess config len 413
debug3: AIX/loginrestrictions returned 0 msg (none)
debug2: input_userauth_request: setting up authctxt for patrol
debug2: input_userauth_request: try method none
Failed none for patrol from 10.x.x.x port 62644 ssh2
debug1: audit event euid 0 user patrol event 3 (SSH_failnone)
debug1: userauth-request for user patrol service ssh-connection method keyboard-interactive
debug1: attempt 1 failures 1
debug2: input_userauth_request: try method keyboard-interactive
debug1: keyboard-interactive devs
debug1: auth2_challenge: user=patrol devs=
debug1: kbdint_alloc: devices ''
debug2: auth2_challenge_start: devices
Failed keyboard-interactive for patrol from 10.x.x.x port 62644 ssh2
debug3: AIX/setauthdb set registry 'files'
debug3: aix_restoreauthdb: restoring old registry ''
debug1: audit event euid 0 user patrol event 5 (SSH_failkbdint)
debug1: userauth-request for user patrol service ssh-connection method password
debug1: attempt 2 failures 2
debug2: input_userauth_request: try method password
debug3: AIX/authenticate result 0, authmsg
debug3: AIX SYSTEM attribute compat
debug3: AIX/setauthdb set registry 'files'
debug3: AIX/passwdexpired returned 0 msg
debug3: aix_restoreauthdb: restoring old registry ''
Accepted password for patrol from 10.x.x.x port 62644 ssh2
debug3: AIX/setauthdb set registry 'files'
debug1: AIX/loginsuccess: msg 1 unsuccessful login attempt since last login.
Last unsuccessful login: Thu Jun 4 13:10:53 EDT 2009 on ssh from ftp-hostname
Last login: Thu Jun 4 13:07:29 EDT 2009 on ssh from ftp-hostname
debug3: aix_restoreauthdb: restoring old registry ''
debug1: audit event euid 0 user patrol event 2 (SSH_authsuccess)
debug1: Entering interactive session for SSH2.
debug2: fd 6 setting O_NONBLOCK
debug2: fd 7 setting O_NONBLOCK
debug1: server_init_dispatch_20
debug1: server_input_channel_open: ctype session rchan 0 win 2097152 max 32768
debug1: input_session_request
debug1: channel 0: new [server-session]
debug1: session_new: init
debug1: session_new: session 0
debug1: session_open: channel 0
debug1: session_open: session 0: link with channel 0
debug1: server_input_channel_open: confirm session
debug1: server_input_channel_req: channel 0 request subsystem reply 1
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req subsystem
subsystem request for sftp
debug1: PID before execing the sftp server:987236
debug1: ALLOW FILES:
debug1: subsystem: exec() /usr/sbin/sftp-server
debug1: calling function do_exec
debug1: audit run command euid 0 user patrol command '/usr/sbin/sftp-server'
debug2: fd 4 setting TCP_NODELAY
debug2: fd 9 setting O_NONBLOCK
debug3: fd 9 is O_NONBLOCK
debug1: Received SIGCHLD.
debug1: session_by_pid: pid 1040638
debug1: session_exit_message: session 0 channel 0 pid 1040638
debug2: channel 0: request exit-status confirm 0
debug1: session_exit_message: release channel 0
debug2: channel 0: write failed
debug2: channel 0: close_write
debug2: channel 0: chan_shutdown_write: shutdown() failed for fd9: A socket must be already connected.
debug2: channel 0: output open -> closed
debug2: channel 0: read<=0 rfd 9 len 0
debug2: channel 0: read failed
debug2: channel 0: close_read
debug2: channel 0: input open -> drain
debug2: channel 0: ibuf empty
debug2: channel 0: send eof
debug2: channel 0: input drain -> closed
debug2: channel 0: send close
debug2: notify_done: reading
debug3: channel 0: will not send data after close
debug2: channel 0: rcvd close
debug3: channel 0: will not send data after close
debug2: channel 0: is dead
debug2: channel 0: gc: notify user
debug1: session_by_channel: session 0 channel 0
debug1: session_close_by_channel: channel 0 child 0
debug1: session_close: session 0 pid 0
debug2: channel 0: gc: user detached
debug2: channel 0: is dead
debug2: channel 0: garbage collecting
debug1: channel 0: free: server-session, nchannels 1
debug3: channel 0: status: The following connections are open:
#0 server-session (t4 r0 i3/0 o3/0 fd 9/9 cfd -1)
debug3: channel 0: close_fds r 9 w 9 e -1 c -1
Connection closed by 10.x.x.x
debug1: do_cleanup
Closing connection to 10.x.x.x
debug1: audit event euid 0 user patrol event 11 (SSH_connclose)
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[FONT=Arial]It looks like your SFTP server can resolve the IP of your client:

It would be worth putting your client machine's name and IP address into the hosts file of the SFTP server machine.

It looks like SSHD does not get your entered password:
But it then tries to use a keyboard entered password and lets the patrol user on (hence announcing the last failed login):
but then succeeds in logging the patrol user on:
But then shuts down:
Prior to this close down is when sshd invokes ftp-server, perhaps that is the problem?